Rubber, vulcanized or thermoplastic -
Determination of hardness -
Part 3: Dead-load hardness using the very low
rubber hardness (VLRH) scale
(ISO 48-3:2018, IDT)
This document specifies a dead-load method for the determination of the hardness of very soft
vulcanized or thermoplastic rubbers using the very low rubber hardness (VLRH) scale.
The relation between the depth of penetration and the VLRH scale is linear.
